YearrooWhen did the Mexican–American War begin?
184619th century · 1800s
The Mexican–American War begins.
When it ended, the US gained California and most of the Southwest.
1846
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Around the same time
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- When did Texas join the United States?1845
- When was Neptune discovered?1846
- When was anesthesia with ether first shown in public?1846
- When did the California Gold Rush begin?1848
- When was the Communist Manifesto published?1848
- When was the Seneca Falls Convention on women's rights?1848
Some events played out over months or years, so we use the year they are best known for. Spotted a mistake? Email [email protected].